US20190191758A1 - A cleaning unit, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements - Google Patents

A cleaning unit, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements Download PDF

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Publication number
US20190191758A1
US20190191758A1 US16/327,841 US201716327841A US2019191758A1 US 20190191758 A1 US20190191758 A1 US 20190191758A1 US 201716327841 A US201716327841 A US 201716327841A US 2019191758 A1 US2019191758 A1 US 2019191758A1
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Prior art keywords
elements
rod
cleaning
zone
train
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Abandoned
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US16/327,841
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English (en)
Inventor
Leszek Sikora
Radoslaw Figarski
MUSIJOWSKI Jan
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International Tobacco Machinery Poland Sp zoo
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International Tobacco Machinery Poland Sp zoo
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Publication of US20190191758A1 publication Critical patent/US20190191758A1/en
Assigned to INTERNATIONAL TOBACCO MACHINERY POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA reassignment INTERNATIONAL TOBACCO MACHINERY POLAND SPOLKA Z OGRANICZONA ODPOWIEDZIALNOSCIA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MUSIJOWSKI, Jan, FIGARSKI, RADOSLAW, SIKORA, LESZEK
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0229—Filter rod forming processes
    • A24D3/0233—Filter rod forming processes by means of a garniture
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/025—Final operations, i.e. after the filter rod forming process
    • A24D3/0254—Cutting means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/027—Multiple line manufacturing devices

Definitions

  • the present disclosure relates to a cleaning unit used in tobacco industry machines, for removing contaminations from a train of rod-like elements, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements.
  • Tobacco industry products such as cigarettes, may comprise segment filters with various filtering materials such as activated charcoal in a form of a loose granulate located between neighboring segments of a solid form.
  • a segment with activated charcoal can be formed by placing the charcoal between the neighboring solid segments, which typically have a form of rod-like elements having filtering properties or rod-like elements having non-filtering properties, for example comprising aromatic capsules.
  • Manufacturers of filters comprising charcoal or other granulate material aim for placement of portions of the loose material such that the segments neighboring a compartment for granulate materials and other segments in the train of segments are not contaminated with this material.
  • manufacturers expect that the granulate material does not get in between side edges of a wrapper which are joined with glue.
  • a U.S. patent U.S. Pat. No. 3,482,488 discloses a device for removing contaminations from rod-like elements by means of a rotating brush.
  • a drawback of this solution is a low cleaning efficiency.
  • a PCT application WO2016139198 in the name of the present applicant, discloses suction nozzles arranged on both sides of a moving train of segments.
  • the aim of the present invention is to provide a device for producing multi-segment filter rods comprising loose material, wherein particles of the material, which are not placed in compartments between solid segments or are lifted from the surface of the segments, are prevented from displacing in the direction of movement of the train of segments, i.e. that they are prevented from displacing between the consecutive assemblies of the device or zones in which consecutive operations of a filter rods production process take place.
  • the tobacco industry machine is configured to process a moving train of rod-like elements separated by compartments and partially wrapped with a wrapper, wherein the compartments are filled with a loose material forming segments of the loose material.
  • the cleaning unit is positioned in the tobacco industry machine in a cleaning zone that is located between: a filling zone for filling the loose material into the compartments between the rod-like elements and a garniture zone for forming the train of the rod-like elements to a continuous filter rod.
  • the cleaning unit is configured to remove contaminations of the loose material from the rod-like elements, the segments of the loose material and the wrapper;
  • the cleaning unit comprises: at least one cleaning element, located in the cleaning zone, for removing the contaminations of the loose material from the rod-like elements; at least one suction element for removing the contaminations of the loose material from the rod-like elements; a shifting mechanism configured to move covering elements to positions in which the covering elements at least partially cover the compartments filled with the loose material between the rod-like elements during the movement of the train in a vicinity of the suction nozzle.
  • the covering elements, at a portion of their track of movement are configured to move in parallel to the direction of movement of the rod-like elements.
  • the cleaning unit further comprises an outlet partition at an outlet from the cleaning zone for limiting an uncontrolled displacement of contaminations from the cleaning zone to the garniture zone, located above the train of the rod-like elements and having a passage through which the covering elements pass.
  • the cleaning unit may comprise the inlet partition located at the inlet to the cleaning zone for limiting the uncontrolled displacement of contaminations from the filling zone to the cleaning zone.
  • the cleaning unit may comprise an end partition located at the inlet of the garniture zone, for limiting the uncontrolled dislocation of the contaminations from the cleaning zone to the garniture zone located above the train of the rod-like elements and having a notch, through which the edge of the wrapper passes.
  • the cleaning unit may comprise a shield partition having a surface which is in parallel to the direction of movement, located in front of the end partition with respect to the direction of movement, for limiting the uncontrolled dislocation of the contaminations from the cleaning zone on to the rod-like elements of the train.
  • the cleaning unit may further comprise an initial partition located at the outlet of the filling zone, for limiting the uncontrolled dislocation of the contaminations from the filling zone to the cleaning zone.
  • At least one partition may be positioned transversally to the direction of movement.
  • At least one partition may have a form of a flat plate.
  • At least one partition may have a form or arched shaped plate.
  • At least one partition may have the main surface directed at an acute angle with respect to the direction of movement.
  • the covering element may have a thin-walled covering element.
  • the suction element may have a form of a suction nozzle having longitudinal suction opening.
  • the cleaning element may be a scraping element in a form of a brush.
  • the cleaning element may be a scraping element in a form of a compressed air nozzle.
  • a machine for tobacco industry for producing multi-segment filter rods comprising: a feeding unit for arranging, in a spaced relationship, rod-like elements in a train on a wrapper placed on a garniture belt; a supplying unit for supplying a loose material into compartments between the rod-like elements; a cleaning unit for removing contaminations of the loose material from the rod-like elements; a garniture unit for wrapping the wrapper around the rod-like elements and the loose material to form a continuous filter rod; a cutting head for cutting the continuous rod into multi-segment filter rods.
  • the cleaning unit may be the unit as described above.
  • the method comprises removing contaminations of the loose material in a cleaning zone by moving covering elements to positions in which the covering elements at least partially cover the compartments filled with the loose material between the rod-like elements during the movement of the train in a vicinity of a cleaning element, wherein the covering elements in part of their track of movement are moved in parallel to the direction of movement of the rod-like elements.
  • the method comprises limiting uncontrolled displacement of the contaminations from the cleaning zone by providing an outlet partition at an outlet of the cleaning zone, above the train of rod-like elements, the outlet partition comprising a passage, through which the covering elements pass.
  • an uncontrolled displacement of the contaminations from the cleaning zone is limited by application of an outlet partition at an outlet of the cleaning zone, above the train of rod-like elements, comprising a passage, through which the covering elements pass.
  • the solution according to the invention provides very efficient cleaning of the rod-like elements while maintaining a high degree of filling of the compartments with the loose material.
  • FIGS. 1 and 2 show fragments of examples of continuous multi-segment rods
  • FIG. 3 shows an example of a multi-segment rod
  • FIG. 4 shows schematically a fragment of a machine for producing multi-segment filter rods
  • FIG. 5 shows a fragment of a machine for producing multi-segment filter rods in a front view
  • FIG. 6 shows a fragment of a machine for producing multi-segment filter rods in a top view
  • FIG. 7 shows a cross-section A-A from FIG. 5 through a compartment with loose material in a train of rod-like elements
  • FIG. 8 shows a cross-section C-C from FIG. 5 through the rod-like element and a suction nozzle
  • FIG. 9 shows a cross-section B-B from FIG. 5 through the rod-like element in the train of rod-like elements
  • FIG. 10 shows an embodiment of a cleaning element in a form of two compressed air nozzles
  • FIG. 11 shows an embodiment in which the compressed air nozzle passes through the suction nozzle
  • FIG. 12 shows a cross-section D-D from FIG. 5 through the rod-like element in the train of rod-like elements.
  • FIG. 13 shows a fragment of a machine for producing multi-segment filter rods in a top view.
  • FIGS. 1 and 2 show fragments of examples of continuous multi-segment rods CR 1 and CR 2 formed from trains of rod-like elements (segments) S 1 , S 2 and SC respectively, prepared during production, formed by the unit according to the invention, wherein the segments are wrapped in a wrapper 101 .
  • the segments S 1 and S 2 have a solid shape, typically cylindrical, whereas the segment SC is formed from a loose material 102 which is located between the segments S 1 and S 1 or between the segments S 1 and S 2 .
  • the presented continuous rods are cut into multi-segment rods.
  • FIG. 3 shows an example of a multi-segment rod R 2 produced from the continuous multi-segment rod CR 2 .
  • FIG. 4 shows schematically a fragment of a machine for producing multi-segment filter rods.
  • the machine comprises a feeding unit 1 , which is configured to arrange the rod-like elements S 1 and S 2 as a train ST 1 , wherein the rod-like elements S 1 and S 2 are transported in a substantially preset spaced relationship.
  • the rod-like elements S 1 and S 2 are fed onto a garniture belt 5 .
  • a wrapper, such as a wrapping paper, is fed on a transporter of the garniture belt 5 and the elements S 1 and S 2 are placed on the wrapper 101 .
  • a filling unit 103 for supplying the loose material 102 , for example activated charcoal, in order to form the segment SC.
  • Lifted edges of the wrapper 101 and front surfaces of the elements S 1 and S 2 form compartments 105 , into which the loose material 102 is fed from the filling unit 103 .
  • the train ST 2 of the rod-like elements S 1 , S 2 and SC that moves on the garniture belt 5 belt is wrapped in the wrapper 101 by a garniture unit 6 , wherein the edges of the wrapper 101 are lifted on a distance where loose material is filled and cleaned.
  • the garniture belt 5 typically forms a part of the garniture unit 6 .
  • a cleaning unit 104 for removing contamination of loose material from the rod-like elements i.e.
  • the produced continuous rod CR is transported further and, after the wrapper 101 is glued in the garniture unit 6 , it is cut by a cutting head 8 into individual multi-segment rods R.
  • FIG. 5 shows an enlarged view of a fragment of a machine for producing filter rods.
  • the train ST 1 of rod-like elements S 1 , S 2 passes through a filing zone Z 1 for feeding the loose material, and next as a train ST 2 of the rod-like elements comprising also the loose material, passes through a cleaning zone Z 2 and through a garniture zone Z 3 for forming a continuous filter rod.
  • FIG. 5 presents consecutive steps of a process of feeding the loose material 102 to the compartments 105 in the filling zone Z 1 , wherein the filling unit 103 for supplying the loose material may be constructed in a way as disclosed in the PCT application WO2016139198 (in the name of the present applicant) or according to other prior art embodiments, such as disclosed in U.S. Pat. Nos. 3,545,345, 3,623,404, DE1432720B2, EP0568278B1.
  • FIG. 5 shows only examples of pockets 103 A of the filling unit 103 .
  • the cleaning unit 104 located next to the filling unit 103 , is equipped with covering elements 10 mounted on a chain transporter 15 , shown in FIG. 6 , which is equipped with two chain wheels 16 .
  • the covering elements 10 may have a form of elements as disclosed in PCT application WO2016139198 (in the name of the present applicant).
  • the covering elements 10 on a fragment of their moving trajectory move linearly in parallel to the displacement direction T, which is the direction of movement of the train ST 1 , ST 2 of the rod-like elements, wherein additionally on a certain distance, they move vertically, transversally to the direction of displacement T in order to approach the compartment 105 filled with the loose material 102 , which can be realized by means of a plain linear bearing, while the figure does not show a mechanism for realization of this movement.
  • a downwards movement is indicated by an arrow F
  • an upwards movement is indicated by an arrow G
  • a movement along the train ST 2 is indicated by an arrow H.
  • FIG. 7 shows the covering element 10 having a thin-walled covering part 10 A, which covers the compartment 105 .
  • a cleaning element in the presented embodiment having a form of at least one brush 11 , 11 ′, for sweeping the contaminations, in a form of the loose material 102 , away from the surface of segments S 1 , S 2 . Therefore, the brush 11 , 11 ′ is a contaminations sweeping element.
  • a cleaning part 11 A (bristles) of the brush 11 , 11 ′ touches the side surface of the element S 2 (in the presented step of movement of the covering element 10 ).
  • the number of brushes 11 , 11 ′ in the cleaning zone Z 2 may be provided according to the needs.
  • a suction nozzle 12 which may have a plurality of openings or one longitudinal opening located in parallel to the train ST 1 just above elements S 1 , S 2 such that the covering parts 10 A of the covering elements 10 can move below the nozzle 12 , as shown in FIG. 9 .
  • the cleaning element may also have a form of a compressed air nozzle, which removes contaminations of the side surface of the elements S 1 , S 2 , by blowing them out.
  • FIG. 10 shows two compressed air nozzles 17 and 18 , which are directed towards recesses formed by the side surfaces of the rod-like elements S 1 and S 2 and the wrapper 101 .
  • the compressed air nozzles 17 and 18 may be directed perpendicularly to the direction of movement of the rod-like elements, or at an angle a with respect to this direction as shown in FIG. 5 , wherein preferably the angle a is in the range from 30° to 60°, and for example is equal to 45°.
  • FIG. 11 shows another embodiment, wherein the compressed air nozzle 19 passes through the suction nozzle 12 .
  • the compressed air nozzle 19 is directed towards the recess between the element S 1 , S 2 and the wrapper 101 . Locating the outlet of the compressed air nozzle 19 within the inlet of the suction nozzle 12 (in principle within the inlet of the suction element) causes additional air turbulences, which enhance lifting of the contaminations from the surface of the rod-like elements S 1 , S 2 .
  • the cleaning element may have a form of an element made of soft plastic covering an edge for removing the contaminations.
  • the plastic cleaning element may be fixed or may be rotatable.
  • the train ST 2 leaving the cleaning zone Z 2 is prepared for forming the continuous filter rod CR from the train, which is realized in the garniture zone Z 3 .
  • the garniture zone Z 3 there is a glue nozzle 13 and guiding elements (not shown in the drawing for clarity, but known from the prior art) for bending the edges of the wrapper in order to join these edges and glue them in order to form a continuous filter rod.
  • Filling the chamber 105 with the loose material 102 from the pocket 103 A may result in that not the whole amount of loose material is transferred to the chamber 105 .
  • a portion of particles, which have certain velocity, may rebound from the rod-like elements S 1 , S 2 or from the wrapper 101 , and subsequently fall onto the surface of the elements S 1 , S 2 , wherein the falling of the particles of the loose material 102 may occur in any location, for example just before gluing of the edges of the wrapper.
  • partitions 14 , 124 , 34 , 44 , 54 are provided and arranged above the moving train of segments. Due to the fact that the zones of operation of the units may differ from the area occupied by the units themselves, the problem of contaminations displacement may be defined as uncontrollable displacement of the contaminations between the filling zone Z 1 , the cleaning zone Z 2 and the garniture zone Z 3 for forming the rod.
  • the inlet partition 24 is located on the side of the filling zone Z 1 (at the inlet to the cleaning zone Z 2 ) and is intended to limit the uncontrolled displacement of the particles of the material from the filling zone Z 1 to the cleaning zone Z 2 .
  • the outlet partition 34 and the inlet partition 24 may be similar to each other.
  • the outlet partition 34 and the inlet partition 24 may be formed as a single part or as multipart partitions.
  • FIG. 7 shows an exemplary embodiment in which the inlet partition 24 is a two-part partition consisting of parts 24 A and 24 B. Between the parts 24 A and 24 B there is a passage 25 , through which the covering elements 10 may pass. Similarly, FIG.
  • the outlet partition 34 is also a two-part partition and consists of parts 34 A and 34 B. Between the parts 34 A and 34 B there is located a passage 35 , through which the covering elements 10 may pass.
  • the inlet partition 24 is located in front of the brush 11 and the outlet partition 34 is located behind the brush 11 ′.
  • the brushes 11 , 11 ′ can be located in the passages 25 , 35 . As a result, the passage 25 , 35 is effectively narrowed in such a way that there is only space for the passage of the covering element 10 .
  • the partitions 24 , 34 may have surfaces arranged obliquely (at an acute angle) with respect to the direction of the movement T of the train ST 2 , owing to which particles of the contaminations may be rejected aside, outside the track of movement of the train of the rod-like elements.
  • the partitions 24 , 34 may be flat or arched shaped. In FIG. 13 the inlet partition 24 ′ is flat and arranged askew while the outlet partition 34 ′ is arched and arranged askew.
  • the end partition 44 is located at the inlet to the garniture zone, just in front of the glue nozzle 13 in the region where the edges of the wrapper 101 are bent towards each other before gluing them.
  • a shield partition 54 (indicated by dashed line in FIG. 6 ), the main surface of which is located in parallel to the direction of the movement of the train ST 2 , i.e. horizontal.
  • the shield layer 54 prevents the contaminations displacement to the segments S 1 , S 2 just before the initialization of the process of wrapping the wrapper 101 .
  • the presented embodiment utilizes an initial partition 14 at the outlet of the filling zone Z 1 , between the filling zone Z 2 and the cleaning zone Z 2 , which is intended to protect from the displacement of the contaminations outside the filling unit 103 in the direction of the cleaning unit 104 .

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Cleaning In General (AREA)
US16/327,841 2016-09-06 2017-09-02 A cleaning unit, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements Abandoned US20190191758A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PLPL418553 2016-09-06
PL418553A PL234036B1 (pl) 2016-09-06 2016-09-06 Zespół czyszczący, maszyna przemysłu tytoniowego do produkowania sztabek filtrowych wielosegmentowych i sposób czyszczenia ciągu elementów prętopodobnych
PCT/EP2017/072035 WO2018046410A1 (en) 2016-09-06 2017-09-02 A cleaning unit, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements

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Publication Number Publication Date
US20190191758A1 true US20190191758A1 (en) 2019-06-27

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US16/327,841 Abandoned US20190191758A1 (en) 2016-09-06 2017-09-02 A cleaning unit, a tobacco industry machine for producing multi-segment filter rods and a method for cleaning a train of rod-like elements

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Country Link
US (1) US20190191758A1 (zh)
EP (1) EP3509444B1 (zh)
JP (1) JP2019528687A (zh)
KR (1) KR102398923B1 (zh)
CN (1) CN109640709B (zh)
BR (1) BR112019001566A2 (zh)
PL (2) PL234036B1 (zh)
RU (1) RU2744263C2 (zh)
WO (1) WO2018046410A1 (zh)

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JP6737514B2 (ja) 2015-03-04 2020-08-12 インターナショナル タバコ マシーナリー ポーランド スポルカ ジー オグラニクゾナ オドパウイエドジアルノシア 清掃ユニット

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US11388927B2 (en) * 2018-04-05 2022-07-19 R.J. Reynolds Tobacco Company Cigarette filter object insertion apparatus and associated method

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RU2019102260A (ru) 2020-07-28
WO2018046410A1 (en) 2018-03-15
RU2744263C2 (ru) 2021-03-04
JP2019528687A (ja) 2019-10-17
PL234036B1 (pl) 2020-01-31
CN109640709B (zh) 2022-05-27
RU2019102260A3 (zh) 2020-10-13
EP3509444B1 (en) 2020-07-29
KR20190046790A (ko) 2019-05-07
PL418553A1 (pl) 2018-03-12
CN109640709A (zh) 2019-04-16
PL3509444T3 (pl) 2021-01-11
EP3509444A1 (en) 2019-07-17
BR112019001566A2 (pt) 2019-05-14

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